If We Were to Send a Laser Light Pulse Toward

question 84

Multiple Choice

If we were to send a laser light pulse toward the Moon and some of this light were to be reflected toward Earth from retro-reflectors left on the Moon by astronauts,how long after the transmission of the initial flash would the reflected light be detected through a telescope on Earth?

• A) 2.56 microseconds
• B) 2.56 seconds
• C) 1.28 seconds
• D) 1.28 milliseconds

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Definitions:

Retina

A layer at the back of the eyeball containing cells that are sensitive to light and that trigger nerve impulses that pass via the optic nerve to the brain, where a visual image is formed.

Optic Nerve

The nerve that transmits visual information from the retina to the brain.

Choroid Layer

A layer of the eye containing blood vessels and pigment cells, located between the retina and the sclera, primarily responsible for providing oxygen and nourishment to the outer layers of the retina.

Sclera

White, fibrous, outer layer of the eyeball.